The spin measurement of MAXI J1348-630 using the Insight-HXMT data
Abstract
We report the results of fitting Insight-HXMT data to the black hole X-ray binary MAXI J1348-430, which was discovered on January 26th, 2019, We also inferred the ionization state and iron abundancewith the Gas Slit Camera on-board MAXI. Several observations at the beginning of the first burst were selected, with a total of 10 spectra. From the residuals of fits using disc plus power-law models, X-ray reflection signatures were clearly visible in some of these observations. We use the state-of-the-art $\tt {relxill}$ series reflection model to fit six spectra with distinct reflection signatures and a joint fit to these spectra. In particular, we focus on the results for the black hole spin values. Assuming Rin = RISCO, the spin parameter is constrained to be $0.82^{+0.04}_{-0.03}$ with 90 per cent confidence level (statistical only).
- Publication:
-
Monthly Notices of the Royal Astronomical Society
- Pub Date:
- December 2023
- DOI:
- 10.1093/mnras/stad3166
- arXiv:
- arXiv:2309.05232
- Bibcode:
- 2023MNRAS.526.6041S
- Keywords:
-
- accretion;
- accretion discs;
- black hole physics;
- methods: data analysis;
- X-rays: individual: MAXI J1348-630;
- Astrophysics - High Energy Astrophysical Phenomena
- E-Print:
- Accepted for publication in MNRAS